from typing import Any

import pytest
from agnext.application import SingleThreadedAgentRuntime
from agnext.core import BaseAgent, CancellationToken
from test_utils import LoopbackAgent, MessageType


class NoopAgent(BaseAgent):  # type: ignore
    def __init__(self) -> None:  # type: ignore
        super().__init__("A no op agent", [])

    async def on_message(self, message: Any, cancellation_token: CancellationToken) -> Any:  # type: ignore
        raise NotImplementedError

@pytest.mark.asyncio
async def test_agent_names_must_be_unique() -> None:
    runtime = SingleThreadedAgentRuntime()

    _agent1 = runtime.register_and_get("name1", NoopAgent)

    with pytest.raises(ValueError):
        _agent1 = runtime.register_and_get("name1", NoopAgent)

    _agent1 = runtime.register_and_get("name3", NoopAgent)

@pytest.mark.asyncio
async def test_register_receives_publish() -> None:
    runtime = SingleThreadedAgentRuntime()

    runtime.register("name", LoopbackAgent)
    await runtime.publish_message(MessageType(), namespace="default")

    while len(runtime.unprocessed_messages) > 0 or runtime.outstanding_tasks > 0:
        await runtime.process_next()

    # Agent in default namespace should have received the message
    long_running_agent: LoopbackAgent = runtime._get_agent(runtime.get("name")) # type: ignore
    assert long_running_agent.num_calls == 1

    # Agent in other namespace should not have received the message
    other_long_running_agent: LoopbackAgent = runtime._get_agent(runtime.get("name", namespace="other")) # type: ignore
    assert other_long_running_agent.num_calls == 0



@pytest.mark.asyncio
async def test_try_instantiate_agent_invalid_namespace() -> None:
    runtime = SingleThreadedAgentRuntime()

    runtime.register("name", LoopbackAgent, valid_namespaces=["default"])
    await runtime.publish_message(MessageType(), namespace="non_default")

    while len(runtime.unprocessed_messages) > 0 or runtime.outstanding_tasks > 0:
        await runtime.process_next()

    # Agent in default namespace should have received the message
    long_running_agent: LoopbackAgent = runtime._get_agent(runtime.get("name")) # type: ignore
    assert long_running_agent.num_calls == 0

    with pytest.raises(ValueError):
        _agent = runtime.get("name", namespace="non_default")

@pytest.mark.asyncio
async def test_send_crosses_namepace() -> None:
    runtime = SingleThreadedAgentRuntime()

    runtime.register("name", LoopbackAgent)

    default_ns_agent = runtime.get("name")
    non_default_ns_agent = runtime.get("name", namespace="non_default")

    with pytest.raises(ValueError):
        await runtime.send_message(MessageType(), default_ns_agent, sender=non_default_ns_agent)